TCP/IP protocol

SAP Sybase IQ uses TCP/IP to connect clients to databases running on different computers.

When you use the TCP/IP protocol, you can secure client/server communications using transport-layer security and RSA encryption technology.

UDP

UDP is a transport layer protocol that sits on top of IP. SAP Sybase IQ may use UDP to do initial server name resolution and then use TCP for connection and communication.

UDP packets sent by the database server in response to client broadcasts contain no sensitive information. The data contained in these packets is limited to:

the database server name
the port number
the database server version
the names of databases running on the database server

You can hide database names from UDP broadcast responses by using the -dh database option.

You can specify the -sb server option to disable the UDP listeners.

Using TCP/IP with Windows

The TCP/IP implementation for database servers on all Windows platforms uses Winsock 2.2. Clients on Windows Mobile use the Winsock 1.1 standard.

Client/server communications encryption over TCP/IP
By default, communication packets are not encrypted, which poses a potential security risk. You can secure communications between client applications and the database server over TCP/IP using simple encryption or transport-layer security. Transport-layer security provides server authentication, strong encryption using RSA encryption technology, and other features for protecting data integrity.
IPv6 support in SAP Sybase IQ
On IPv6-enabled computers, the network database server listens by default on all IPv4 and IPv6 addresses. IPv6 is not supported on Windows CE.
Firewall connections
There are restrictions on connections when the client application is on one side of a firewall and the database server is on the other side. Firewall software may filter network packets according to network port. Also, it is common to disallow UDP packets from crossing the firewall.
Dial-up network connections (CommLinks connection parameter)
To connect over a dial-up network connection, you must use the CommLinks connection parameter.

Parent topic: Ways to Connect